<template>
  <div class="avue-tags" v-if="showTag">
    <!-- tag盒子 -->
    <div
      v-if="contextmenuFlag"
      class="avue-tags__contentmenu"
      :style="{left:contentmenuX+'px',top:contentmenuY+'px'}"
    >
      <div class="item" @click="clearCacheTags">{{$t('tagsView.clearCache')}}</div>
      <div class="item" @click="closeOthersTags">{{$t('tagsView.closeOthers')}}</div>
      <div class="item" @click="closeAllTags">{{$t('tagsView.closeAll')}}</div>
    </div>
    <div class="avue-tags__box" :class="{'avue-tags__box--close':!website.isFirstPage}">
      <el-tabs
        v-model="active"
        type="card"
        @contextmenu.native="handleContextmenu"
        :closable="tagLen!==1"
        @tab-click="openTag"
        @edit="menuTag"
      >
        <el-tab-pane
          :key="item.value"
          v-for="item in tagList"
          :label="generateTitle(item)"
          :name="item.value"
        ></el-tab-pane>
      </el-tabs>
      <el-dropdown class="avue-tags__menu">
        <el-button type="primary" size="mini">
          {{$t('tagsView.menu')}}
          <i class="el-icon-arrow-down el-icon--right"></i>
        </el-button>
        <el-dropdown-menu slot="dropdown">
          <el-dropdown-item @click.native="$parent.isSearch=true">{{$t('tagsView.search')}}</el-dropdown-item>
          <el-dropdown-item @click.native="closeOthersTags">{{$t('tagsView.closeOthers')}}</el-dropdown-item>
          <el-dropdown-item @click.native="closeAllTags">{{$t('tagsView.closeAll')}}</el-dropdown-item>
          <el-dropdown-item @click.native="clearCacheTags">{{$t('tagsView.clearCache')}}</el-dropdown-item>
        </el-dropdown-menu>
      </el-dropdown>
    </div>
  </div>
</template>
<script>
import { mapGetters, mapState } from 'vuex'
import { clearCache } from '@/api/user'

export default {
  name: 'tags',
  data() {
    return {
      active: '',
      contentmenuX: '',
      contentmenuY: '',
      contextmenuFlag: false,
    }
  },
  created() {},
  mounted() {
    this.setActive()
  },
  watch: {
    tag() {
      this.setActive()
    },
    contextmenuFlag() {
      window.addEventListener('mousedown', this.watchContextmenu)
    },
  },
  computed: {
    ...mapGetters(['tagWel', 'tagList', 'tag', 'website']),
    ...mapState({
      showTag: (state) => state.common.showTag,
    }),
    tagLen() {
      return this.tagList.length || 0
    },
  },
  methods: {
    generateTitle(item) {
      return this.$router.$avueRouter.generateTitle(
        item.label,
        (item.meta || {}).i18n
      )
    },
    watchContextmenu(event) {
      if (!this.$el.contains(event.target) || event.button !== 0) {
        this.contextmenuFlag = false
      }
      window.removeEventListener('mousedown', this.watchContextmenu)
    },
    handleContextmenu(event) {
      let target = event.target
      // 解决 https://github.com/d2-projects/d2-admin/issues/54
      let flag = false
      if (target.className.indexOf('el-tabs__item') > -1) flag = true
      else if (target.parentNode.className.indexOf('el-tabs__item') > -1) {
        target = target.parentNode
        flag = true
      }
      if (flag) {
        event.preventDefault()
        event.stopPropagation()
        this.contentmenuX = event.clientX
        this.contentmenuY = event.clientY
        this.tagName = target.getAttribute('aria-controls').slice(5)
        this.contextmenuFlag = true
      }
    },
    //激活当前选项
    setActive() {
      this.active = this.tag.value
    },
    menuTag(value, action) {
      if (action === 'remove') {
        let { tag, key } = this.findTag(value)
        this.$store.commit('DEL_TAG', tag)
        if (tag.value === this.tag.value) {
          tag = this.tagList[key === 0 ? key : key - 1] //如果关闭本标签让前推一个
          this.openTag(tag)
        }
      }
    },
    openTag(item) {
      let tag
      if (item.name) {
        tag = this.findTag(item.name).tag
      } else {
        tag = item
      }
      this.$router.push({
        path: this.$router.$avueRouter.getPath(
          {
            name: tag.label,
            src: tag.value,
          },
          tag.meta
        ),
        query: tag.query,
      })
    },
    closeOthersTags() {
      this.contextmenuFlag = false
      this.$store.commit('DEL_TAG_OTHER')
    },
    findTag(value) {
      let tag, key
      this.tagList.map((item, index) => {
        if (item.value === value) {
          tag = item
          key = index
        }
      })
      return { tag: tag, key: key }
    },
    closeAllTags() {
      this.contextmenuFlag = false
      this.$store.commit('DEL_ALL_TAG')
      this.$router.push({
        path: this.$router.$avueRouter.getPath({
          src: this.tagWel.value,
        }),
        query: this.tagWel.query,
      })
    },
    clearCacheTags() {
      this.$confirm('是否需要清除缓存?', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      }).then(() => {
        clearCache().then(() => {
          this.contextmenuFlag = false
          this.$message.success('清除完毕')
        })
      })
    },
  },
}
</script>


